Fortnightly Tax Calculator Australia (FY2025-26)
Fortnightly pay is the most common cycle in Australia. Enter your annual salary and we will show exactly what hits your account every two weeks after PAYG, Medicare and HECS — using the FY2025-26 Stage 3 brackets your payroll system already uses.
About this calculator
Around 60% of Australian employees are paid fortnightly, making it by far the dominant pay cycle across professional services, healthcare, government, education and unionised industries. The reason is partly historical and partly practical: 26 pay periods a year line up cleanly with most superannuation and deduction administration, and it gives employees a steadier rhythm than monthly without the admin overhead of weekly. Our fortnightly calculator multiplies your gross fortnightly pay by 26 to derive an annualised figure, applies the FY2025-26 brackets and offsets, then divides back to show a per-fortnight net amount.
A quirk worth knowing: every 11 or 12 years, fortnightly-paid workers receive 27 paydays in a single financial year instead of 26. The next instance falls in FY2031-32 for most calendars. When this happens, ATO withholding tables under-tax slightly because they assume 26 cycles, and you may owe $200-$600 at lodgement. Our calculator uses a 26-period assumption — the standard case — and the AI assistant can flag the 27-payday year for you when it is approaching. For the typical year, the calculator output will sit within a couple of dollars of your real payslip.
Fortnightly cycles also create natural budgeting milestones. Many Australians match major bills (rent, mortgage, insurance) to a fortnightly draw to align with payday — it is why direct-debit forms commonly offer fortnightly options. Knowing your exact net per fortnight, including the impact of HECS jumping into a higher repayment band as you cross thresholds, lets you set those bills accurately. Our tool surfaces the HECS component as a separate line so you see exactly how much disappears to your study loan each fortnight.
How to use
- 1Enter your annual gross salary — this is the pre-tax figure on your contract.
- 2Toggle HECS if you have a study debt; toggle private health if you hold hospital cover.
- 3We annualise (× 26), apply Stage 3 brackets, Medicare and LITO, then divide by 26.
- 4Your fortnightly net pay shows alongside the PAYG and HECS components separately.
- 5Compare scenarios — try adding a salary sacrifice amount and see your fortnightly impact.
Need a professional?
Find a registered tax agent near you
- • Every TPB-registered practice in Australia, by suburb
- • Post what you need — matching practices contact you
- • Free, and your details stay private
AusTax is a directory, not a tax agent. A listing is not an endorsement.
Frequently asked questions
What is a 27-payday year and how does it affect my tax?
Roughly every 11 years, the calendar produces 27 fortnightly paydays in one financial year instead of 26. ATO withholding tables assume 26 cycles, so on the bonus payday your employer slightly under-withholds — typically resulting in a $200 to $600 bill at lodgement. The next instance for most pay calendars is FY2031-32. You can either ask payroll to add a small upwards adjustment for that year, or simply set aside the difference manually. Our calculator uses the standard 26-period model that matches 10 out of every 11 years.
My employer pays super monthly but I am paid fortnightly — does that affect my net?
No. Super Guarantee Contributions are paid by your employer on top of your gross wage and never reduce your take-home. Whether your super hits your fund weekly, fortnightly, monthly or quarterly is purely an admin choice — the dollar amount you see on your fortnightly payslip as net is unaffected. What can affect your net is salary sacrificing extra super, which is deducted from your pre-tax fortnightly wage and reduces your taxable income. Our calculator does not currently model salary sacrifice — use the AI assistant to estimate the fortnightly net change.
I get a bonus once a fortnight from a sales commission — how is it taxed?
If the commission is paid through your normal fortnightly cycle as additional pay, your employer uses ATO Schedule 5, which applies a marginal-rate withholding on the bonus portion specifically. This usually produces a higher tax amount than our calculator shows for that single pay, because the system assumes the bonus represents an annualised increase. At year-end it evens out — the prefilled return uses your actual annual income and gives you back any over-withholding. For consistent commission income, add the expected annual total to your salary input for a more accurate fortnightly average.
How do I budget bills around a fortnightly cycle?
Use the calculator's net figure as your true disposable amount per pay, then split major bills into fortnightly equivalents. For example, a $2,400 monthly mortgage equals roughly $1,108 fortnightly (× 26 ÷ 12 = 2,166, so two payments of $1,108 cover slightly more than the monthly amount). Most Australian banks and lenders accept fortnightly direct debit at no extra cost, and the slight overpayment from the 26-vs-24 difference saves interest over a 30-year loan. Pin the calculator output to your fridge or budgeting app — the consistent number every fortnight makes planning trivial.
Why does the ATO use 26 fortnights instead of true calendar fortnights?
The withholding tables are a practical approximation, not a perfect division of calendar days. Twenty-six cycles assume a clean 364-day pay year, ignoring the extra 1.25 days a year that accumulate. This is why a 27-payday year periodically shows up. The benefit is administrative simplicity: every fortnightly payslip applies an identical tax calculation regardless of which fortnight it is. Your final tax position is squared up at lodgement, where the ATO uses your actual gross wage from STP data, not the withholding table approximation.
Authoritative sources
All rates and thresholds used in this calculator are sourced from the Australian Taxation Office (ATO).
Want a full refund estimate?
Our main refund calculator combines all these rules — enter your salary and deductions for a full annual refund estimate.
Open main calculator →